Most pervasive GIS formats?

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Where can one found out what the most pervasive GIS formats are?

For example, from the GIS file formats Wikipedia page, there 4 broad categories, each with many popular formats.

1. Raster formats (13 formats listed)
2. Vector formats (19)
3. Grid formats (4)
4. Other formats (5)

This is a dizzying array of alternatives, each with their own reasons for existence.

In terms of general formats though, what are the most pervasive ones in use?

Edit: By pervasive, I'm looking for say the top 3 formats that would be encountered if a company that used GIS data was randomly selected out of all companies using GIS data



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